This work made use of Python (Python Software Foundation) and the IPython software [1]},
as well as of the Python packages Numpy [2]}, Pandas [3]}, Matplotlib [4]},
Astropy [5]}, [6]}. In addition we made use of the visualisation software TOPCAT [7]},
and the National Aeronautics and Space Administration (NASA) Astrophysics Data System (ADS).
